ASN

http://tcllib.sourceforge.net/doc/asn.html

"Abstract Syntax Notation" in ITU-T X.680 [L1 ]; also note related language specifications [L2 ]. These are all reference materials, largely opaque to humans; we need to mention here also such tutorials as Milan and Dubuisson's [L3 ] and Kaliski's ".. Layman's Guide ..." [L4 ].

X.509v3 Certificate Viewer example based on the tcllib asn package

SNACC

ASN.1 is commonly used in the following applications

• Cryptography related file formats (X509 certificates, PKCS#7 messages) etc.
• ldap
• Telecommunications systems like Bluetooth, H232, UMTS etc.
• SNMP
• Library catalogue systems based on the Z39.50 protocol, see Yaz

There is a tcllib asn package which is able to parse almost all ASN BER/DER objects.

The yaz package contains an asn1 compiler written in Tcl, yaz-asncomp, which produces C-code currently.